Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2012        Go!    
 
 
September 23, Saturday 2017 12:19 AM       

       HEADLINES: SC approves admissions to three pvt medical colleges                                              Thomas Chandy’s issue needs to be discussed within LDF: CPI                                              One-week old dead body found in Thiruvananthapuram                                              RSS functionary Nandakumar lashes out at Pinarayi                                              Single-Bench has right to lift ban on Sreesanth: HC                                              Dawood is in Pak: Kaskar tells Thane police                                              Ready to contest if election can be held within 100 days: Kamal Haasan                                              Navy gets its first indigenous submarine ‘Kalvari’                                              'Madman' Kim Jong-Un doesn't mind starving or killing his people: Trump                                              Zardari resposnible for Benazir Bhutto's murder: Musharraf                                              Moon at UN: S Korea not seeking collapse of N Korea                                              China bans use of anti-Islam words on social media                                              Pakistan a 'terroristan': India                                              Paes, Raja reach St. Petersburg Open tennis semi-finals                                              Srikanth, Prannoy lose; Pranaav-Sikki in semis of Japan Open                                              India dethrone SA to attain top spot in ODIs                                              Kaumudi Facebook
       SCI&TECH Next Article: ISRO to launch record 104 satellites on Feb 15  
       Over 100 new potential planets spotted
 
         Posted on :16:18:47 Feb 14, 2017
   
A A
       Last edited on:16:18:47 Feb 14, 2017
         Tags: Over 100 new potential planets, spotted
 
WASHINGTON: Scientists have detected more than 100 new potential exoplanets, including one orbiting a star about 8.1 light years away from the Earth, using one of the most successful techniques for spotting alien worlds.
 
Astronomers released the largest-ever compilation of exoplanet-detecting observations made using a technique called the radial velocity method.
 
The radial velocity method takes advantage of the fact that the planet's gravity also affects the star. Astronomers are able to use sophisticated tools to detect the tiny wobble the planet induces as its gravity tugs on the star.
 
The virtual mountain of data was gathered as part of a two-decade radial velocity planet-hunting programme that uses a spectrometer called HIRES, mounted on the 10-metre Keck-I telescope of the W M Keck Observatory atop Mauna Kea in Hawaii.
The compilation includes almost 61,000 individual measurements made of more than 1,600 stars.
 
By making the data public, the team is offering unprecedented access to one of the best exoplanet searches in the world.
 
"HIRES was not specifically optimised to do this type of exoplanet detective work, but has turned out to be a workhorse instrument of the field," said Steve Vogt of the University of California Santa Cruz in the US, who built the instrument.
 
Now as the survey moves into its third decade, the team members have decided it is time to clean house. With so much data at hand and a limited amount of time, they recognised that more exoplanets would be found by sharing their catalogue with the exoplanet community.
 
Mikko Tuomi of the University of Hertfordshire in the UK led a sophisticated statistical analysis of the large data set to tease out the periodic signals most likely to be planets.
 
"We were very conservative in this paper about what counts as an exoplanet candidate and what does not, and even with our stringent criteria, we found over 100 new likely planet candidates," Tuomi said.
 
One of these probable planets is around a star called GJ 411, also known as Lalande 21185. It is the fourth-closest star to our own Sun and is only about 40 per cent the mass of the Sun. The planet has a very short orbital period of just under 10 days, so it is no Earth-twin.
 
However, the planet, GJ 411b, continues a trend that has been seen in the overall population of detected exoplanets: the smallest planets are found around the smallest stars.
 
The team is hoping their decision will lead to a flurry of new science, as astronomers around the globe combine the HIRES data with their own existing observations, or mount new observing campaigns to follow up on potential signals.
 
The catalogue release is part of a growing trend in exoplanet science to broaden the audience and discovery space, which has emerged in part to handle the aftermath of follow-up discoveries by NASA's Kepler and K2 missions.
The research appears in The Astronomical Journal.
A A
       SCI&TECH
Next Article: ISRO to launch record 104 satellites on Feb 15
 
 
SCI&TECH HEADLINES
Astrophysicists make music from Saturn's moons, rings  
Rooter includes Kabbadi, F1 under one roof  
Orbiting supermassive black holes discovered for first time  
Theweightmonitor.com launches mobile app for easier access to one-stop weight management platform  
New drug to treat blood cancer developed  
Threat of asteroid impact looming over Earth: experts  
Hottest known planet in universe discovered  
Wireless, battery-less pacemaker developed  
'Manned missions to Moon, Mars may face medical emergencies'  
Ransomware threat: Centre activates mechanism to prevent ‘Wannacry’ cyber attack  
2 lakh hit by 'unprecedented' cyberhack in 150 nations:Europol  
foodpanda revamps mobile app; provides more options  
ixigo launches trains app for Apple iOS users  
Virtual humans may help doctors learn empathy: study  
Gamers, here are five games to watch out for  
Yahoo India homepage gets brand new look  
Spacecraft flies between Saturn and rings in historic 1st  
Google targets 'fake news,' offensive search suggestions  
Offensive WhatsApp posts can land group admin in jail  
Facebook for 'everyone' and not just high end: Zuckerberg  
Google Earth re-invented for new era  
NASA images show how India looks from space at night  
Signs of life detected below world's deepest point  
'iPhones assembly in Bengaluru by Apple in less than a month'  
Five astronauts assigned to future ISS mission: NASA  
 
Do you support taking over of Guruvayur Parthasarathy temple by the government?
yes
 
no
 
no opinion
 
 
 
Home Kerala India World Business Sports Sci&Tech Education Automobile CityNews Movies Environment Letters 
© Copyright keralakaumudi Online 2011  |  Reproduction in whole or in part without written permission is prohibited.
Head Office Address: Kaumudi Buildings, Pettah P.O, Trivandrum - 695024, India.
Online queries talk to Deepu Sasidharan, + 91 98472 38959 or Email deepu[at]kaumudi.com
Customer Service -Advertisement Disclaimer Statement   |  Copyright Policy